/*
 * Copyright (C) 2022 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import { BaseStruct } from './BaseStruct.js';
import { ns2x } from '../component/trace/TimerShaftElement.js';
import { Rect } from '../component/trace/timer-shaft/Rect.js';

export class HeapStruct extends BaseStruct {
  static hoverHeapStruct: HeapStruct | undefined;
  startTime: number | undefined;
  endTime: number | undefined;
  dur: number | undefined;
  eventType: string | undefined;
  heapsize: number | undefined;
  density: number | undefined;
  maxHeapSize: number = 0;
  minHeapSize: number = 0;

  static setFrame(node: HeapStruct, padding: number, startNS: number, endNS: number, totalNS: number, frame: Rect) {
    let x1: number, x2: number;
    if ((node.startTime || 0) < startNS) {
      x1 = 0;
    } else {
      x1 = ns2x(node.startTime || 0, startNS, endNS, totalNS, frame);
    }
    if ((node.startTime || 0) + (node.dur || 0) > endNS) {
      x2 = frame.width;
    } else {
      x2 = ns2x(
        // @ts-ignore
        node.startTime + node.dur,
        startNS,
        endNS,
        totalNS,
        frame
      );
    }
    let getV: number = x2 - x1 <= 1 ? 1 : x2 - x1;
    let rectangle: Rect = new Rect(
      Math.floor(x1),
      Math.ceil(frame.y + padding),
      Math.ceil(getV),
      Math.floor(frame.height - padding * 2)
    );
    node.frame = rectangle;
  }

  static draw(ctx: CanvasRenderingContext2D, data: HeapStruct) {
    if (data.frame) {
      let width = data.frame.width || 0;
      ctx.fillStyle = '#2db3aa';
      ctx.strokeStyle = '#2db3aa';
      if (data.startTime === HeapStruct.hoverHeapStruct?.startTime) {
        ctx.lineWidth = 1;
        ctx.globalAlpha = 0.6;
        let drawHeight: number = Math.ceil(((data.heapsize || 0) * (data.frame.height || 0)) / data.maxHeapSize);
        ctx.fillRect(data.frame.x, data.frame.y + data.frame.height - drawHeight, width, drawHeight);
        ctx.beginPath();
        ctx.arc(data.frame.x, data.frame.y + data.frame.height - drawHeight, 3, 0, 2 * Math.PI, true);
        ctx.fill();
        ctx.globalAlpha = 1.0;
        ctx.stroke();
        ctx.beginPath();
        ctx.moveTo(data.frame.x + 3, data.frame.y + data.frame.height - drawHeight);
        ctx.lineWidth = 3;
        ctx.lineTo(data.frame.x + width, data.frame.y + data.frame.height - drawHeight);
        ctx.stroke();
      } else {
        ctx.globalAlpha = 0.6;
        ctx.lineWidth = 1;
        let drawHeight: number = Math.ceil(((data.heapsize || 0) * (data.frame.height || 0)) / data.maxHeapSize);
        ctx.fillRect(data.frame.x, data.frame.y + data.frame.height - drawHeight, width, drawHeight);
      }
    }
    ctx.globalAlpha = 1.0;
    ctx.lineWidth = 1;
  }
}
